In 1991 (11 years old) I had a backwards S curve- 37 on top, 105 on the bottom- and they did a fusion T3-L4 with native graft and corrected everything to 27 on top and 35 on the bottom. Obviously I have very limited or non-existent mobility in the waist- I cannot twist and cannot bend. I am in DESPERATE need of some ab exercises that I can do. No crunches, no sit-ups, no twisting maneuvers. Has anyone had any success with ab exercises post-fusion? I have done different plank maneuvers but I am looking for another way to activate my abdominal muscles. Any input is appreciated. Thanks!